We're willing to bet that ears are still ringing from last year's Mayhem Festival, where nearly two dozen acts spent half a day pummeling the crowd with hard rock. Mayhem isn't stopping here this year, but metalheads shouldn't worry thanks to the Uproar Festival, which is bringing 10 bands (plus free Rockstar Energy Drinks!) to make sure head-banging fans leave needing a neck brace. Buckcherry will drop hyper-intellectual gems like 2006's Crazy B---- alongside slow-burner Sorry in the early sets, and if they don't provide enough aggro-therapy, the evening main stage lineup features bands like Seether and Godsmack. We can feel the snake biting into our veins already.

Merchandise's origins are rooted in the DIY principles and underground ethics of Tampa's long-running punk/hardcore scene. Frontman Carson Cox and company have spent the last half-decade inching further into the limelight, however, and on Tuesday they released their highly anticipated 4AD debut, After the End. The effort's 44 minutes reek with the sweetness of Cox's glorious melancholy, buoyed by waves of guitarist Dave Vassalotti's shimmering, swirling guitar and flanked with occasional, weird electronic flourishes. This hometown album release is still being celebrated in one of Tampa's most iconic, understated cocktail spots. Get there early if you don't want to be watching from outside.

One of Ybor's most beloved music festivals is calling it quits, and curators are going out with a bang. During its decade-long run, Summer Jam's specialty has been booking artists before they break; rising rocker Benjamin Booker played last year, and Merchandise's Carson Cox performed at Summer Jam 2 as part of another band, Dry County. The trend continues when a pair of Georgia acts, Reptar and New Madrid, provide dance-ready hyphy-pop and raging rock 'n' roll. There's also DeLand psych-folkers Roadkill Ghost Choir, which just played Lollapalooza, and Gainesville art-rock outfit Dear + Glorious Physician, in the midst of a spirited reunion. Fans of quirky alt-folk should definitely catch DieAlps! or Good Graeff. Don't overlook Have Gun, Will Travel; Beach Day; Sunbears!; Gwan Massive; and Millionyoung, though, because they'll be peppering the eclectic bill with everything from Americana to electronica, making this final lineup one of strongest the fest has ever seen.

Under the Roxx Gang moniker, singer Kevin Steele enjoyed the privilege of releasing his band's debut album on Virgin Records. The band bounced from label to label over the next decade, and at the turn of the century Roxx Gang decided to change their name to Mojo Gurus while ditching their glam-rock sound in favor of a more Southern, blues-dominated style. The rest is bar-rock history that has been etched into the memories of the fans who have supported the Gurus over the course of three raucous, unabashedly rock 'n' roll records. On Saturday those fans get an early taste of a new LP, with a special treat on the side. The band, normally a four-piece, gets help from keyboardist Howard Helm and horn player Mic Smith as they play songs from Who Asked Ya?, which isn't due until Sept. 16. Long-running folk-rockers Rebekah Pulley and the Reluctant Prophets open this WMNF-FM 88.5-sponsored show.

Umphrey's McGee waited six years between St. Pete gigs before they returned to the 'Burg for last April's Jannus Live show. This time around, the Chicago sextet are hawking a new album titled Similar Skin, but the collection isn't a phoned-in retread. Led by guitarist Brendan Bayliss, the fellas actually dialed in to focus on making a rock 'n' roll record. They mostly succeeded, and where a few songs still hint at the band's love of proggy King Crimson-esque riffs, the majority of Skin is a fun, straightforward affair. It might not be as out-there and ostensibly complex as some of their other work, but it's still better than most — if not all — of the jam-band material floating around these days. The Heavy Pets open this early show, but members of the band will go on to play a late-night party down the road (at the Local 662) under the Lather Up moniker. Tickets to that one are $10-$12; see facebook.com/thelocal662 for details.